diff -r 85fec26392d7 -r fd3320bf6413 hotspot/src/share/vm/runtime/globals.hpp
--- a/hotspot/src/share/vm/runtime/globals.hpp	Fri Apr 01 03:33:39 2016 +0000
+++ b/hotspot/src/share/vm/runtime/globals.hpp	Fri Apr 01 07:08:30 2016 +0200
@@ -2411,9 +2411,6 @@
   develop(bool, TraceGCTaskQueue, false,                                    \
           "Trace actions of the GC task queues")                            \
                                                                             \
-  diagnostic(bool, TraceGCTaskThread, false,                                \
-          "Trace actions of the GC task threads")                           \
-                                                                            \
   develop(bool, TraceParallelOldGCMarkingPhase, false,                      \
           "Trace marking phase in ParallelOldGC")                           \
                                                                             \